Repairing Double Glazed Windows Double-glazed Windows "blow", the insulating gas argon escapes, which causes them to lose their energy efficiency. The good news is that blowing double glazing is usually repaired without needing to replace the windows. The most typical sign of a damaged window seal is condensation or moisture https://xn--80agpaebffqikmu.xn--p1ai/user/juneappeal07/